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256-KB or 512-KB of pipeline burst secondary cache integrated on system board; direct mapped write-back
and write-through organization.
The system comes with 32 MB of main system memory. Two sockets on the system board support up to 256
MB of high-speed memory using industry-standard gold-plated dual in-line memory modules (DIMMs).
The system supports 60-ns Synchronous DRAM (SDRAM) or Extended Data Out (EDO) DRAM.
The system supports the following 60-ns configurations:
1-MB by 64-bit (8-MB DIMM)
2-MB by 64-bit (16-MB DIMM)
4-MB by 64-bit (32-MB DIMM)
8-MB by 64-bit (64-MB DIMM)
16-MB by 64-bit (128-MB DIMM).
Chipset
The Intel 82430TX PCI chipset provides DMA, memory, bus, and cache control. The chipset includes the
following chips:
430TX System Controller (MTXC) ¾ integrates the cache, main memory DRAM control and provides bus
control to handle transfers between the processor, cache, main memory, and PCI bus.
430TX PCI ISA IDE Xcelerator (PIIX4) ¾ features multifunction PCI to ISA bridge/USB support.
PCI Local Bus
The 32-bit industry-standard PCI bus is a highly-integrated input/output (I/O) interface that offers the highest
performance local bus available for the Pentium processor. The PCI bus supports burst modes that send
large chunks of data across the bus, allowing fast displays of high-resolution images.
The high-bandwidth PCI local bus eliminates data bottlenecks found in traditional systems, maintains
maximum performance at high clock speeds, and provides a clear upgrade path to future technologies.
The PCI bus contains two embedded PCI devices: the PCI local bus IDE interface and the PCI video/graphics
controller. The PCI bus also contains a connector for attaching the bus expansion board.
Expansion Bus
The expansion bus contains three ISA slots and three PCI slots. The PCI ISA IDE Xcelerator chip (430TX)
provides the logic that enables the ISA bus functions. With 24-bit memory addressing, a 16-bit data path, and
™
an eight MHz clock, the ISA bus is designed to support all peripherals compatible with the IBMÒ AT
standard. For PCI functions, the Xcelerator chip provides 32-bit memory addressing, 32-bit data path, and a
33 MHz clock speed.
BIOS
The BIOS (Basic Input Output System) is stored in the Intel U6520222D Flash EPROM. The Flash EPROM is
reprogrammable and allows fast, economical BIOS upgrades.
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